JP2912833B2 - Drain horizontal main pipe offset upper joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain horizontal main pipe offset upper joint in a drain pipe provided in a multi-story building.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 4, a drain pipe provided in a multi-story building includes a horizontal branch pipe 12 connected to a drainage device 11 such as a toilet in each story, and a horizontal branch pipe 12. , A drainage pipe 14 that connects the collecting pipes 13 of each level to form a straight line, and a lowermost collecting pipe 13.
(Or standing pipe 14) is formed into a single pipe by a drain horizontal main pipe 16 connected to a lower end through a bent leg pipe 15 and the like, and is discharged through a meeting place 17.

Conventionally, when the first floor of a building is a garage, as shown in FIG. 4, a horizontal drain main pipe 16 is connected to 45-degree curved pipes 18 and 19 to form a vertical offset section 20.
As shown in FIG. 5, 90 degree curved pipes 21 and 22 and a lower standing pipe 23 are connected to each other so as to be one vertical.
In some cases, an offset portion 24 having a height on the order of a floor is provided.

However, when the offset portion 20 is provided in the horizontal drain main pipe 16 as shown in FIG.
Drainage fills the curved pipes 18 and 19, and air is trapped in the upper part of the upper curved pipe 18, the pressure increases, and the material may splash from the drainage device 11. Also, as shown in FIG. 5, when the offset portion 24 is provided in the drain horizontal main pipe 16, when the offset horizontal drawing length (L) is short, when the drain flow rate is large, the inside of the lower standing pipe 23 as shown in FIG. Since the drainage (W) flows down the entire cross section of the pipe, the drainage draws air in the upper pipe from the upper curved pipe 21, and the airflow is blocked by the rebound of the drainage as shown in FIG. Problems such as breakage of the sealing water trap of the floor occur.

Therefore, the offset portion 2 of the horizontal drain main pipe 16 is provided.
The above problem is solved by providing an air vent pipe 25 (see FIG. 5) that bypasses the upstream and downstream sides of 0 and 24.

[0006]

However, in the above prior art, as described above, an air vent pipe that bypasses the upstream and downstream sides of the offset portions 20 and 24 is indispensable, and the pipe becomes complicated. is there. The present invention has been made in view of the above-described situation, and has an object of eliminating the need for an air vent pipe and realizing a swirling flow in the offset part pipe even when the drainage flow rate is large, thereby reducing the air pressure in the pipe. An object of the present invention is to provide a drainage horizontal main pipe offset upper joint which can be easily and inexpensively obtained with a structure capable of preventing the rise.

[0007]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, the present invention is an offset upper joint of a drain horizontal main pipe connected via a curved pipe or the like to the upper or lower end of the drainage pipe of a multi-story building or to the middle or the lower end of the lowermost collecting pipe, 4 joints
It consists of a bent pipe bent at 5 or 90 degrees, and drains the water flowing into the offset upper joint into the inner curved wall of the joint.
The drainage swirl vanes are aligned with the pipe axis so as to drift toward the side wall.
It is characterized by being arranged diagonally .

Further, the present invention is characterized in that the drainage swirl vanes are provided so as not to be located on the center line of the upper tube bottom of the joint.

[0009]

According to the present invention, even if the drainage flow rate is large, the drainage flowing into the offset upper joint from the drain horizontal main pipe, etc.
The swirling force provided by the drainage swirl vanes provided in the joint flows down while swirling along the inner wall of the joint and the lower riser pipe or the inner wall of the lower offset joint. The ventilation space (air core) is formed in communication. Therefore, an increase in the air pressure in the pipe is eliminated, and a stable drainage with a small pressure fluctuation is performed, thereby preventing breakage of water sealing.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an offset upper joint 1 of the present invention,
It consists of a 90-degree bent pipe connecting the upper drain horizontal main pipe 2 and the lower standing pipe 3, and connection flanges 6, 7 are provided on the outer periphery of the receiving ports 4, 5 at both ends. On the inner surface of the inner curved wall 1A of the joint 1, the drainage swirl vanes 8 are arranged obliquely at an angle (θ) with respect to the pipe axis (C) and at a position avoiding the center line of the upper pipe bottom 1B. Drainage is prevented from accumulating in the drain horizontal main pipe 2 and the upper pipe bottom 1B in the joint 1.

In the above embodiment, the drainage flowing into the offset upper joint 1 from the drainage horizontal main pipe 2 is deflected in the direction of the joint side wall by the swirl vanes, and a swivel force is applied in the direction indicated by the arrow in FIG. It flows down while turning along the inner wall surface of the lower standing pipe 3 from the standing pipe portion (lower part) of the joint 1. Therefore, the rebound of drainage in the joint 1 is eliminated, a ventilation space is secured above the drainage swirl vanes 8, and an air core communicating with the center of the drainage riser and the collecting pipe is formed. And stable drainage with small pressure fluctuations is performed.

The size, shape, and inclination angle (θ) of the swirling blade 8 in the present invention are appropriately designed in accordance with the inner diameter, the maximum flow rate, and the arrangement position of the drainage riser. The present invention is not limited to the above-described embodiment.
It can also be used for offset upper joints composed of curved tubes.

[0013]

As described above, the present invention relates to the offset of the horizontal drain main pipe connected to the upper and lower ends of the drainage pipe of a multi-story building, the middle or the lower end of the lowermost collecting pipe via a curved pipe or the like. An upper joint comprising a bent pipe bent at 45 or 90 degrees, wherein drainage swirl vanes are disposed on the inner surface of the inner curved wall of the joint. Is unnecessary, and even if the flow rate of the drainage is large, it is possible to prevent a rise in the air pressure in the pipe and to perform a stable drainage. Moreover, the structure can be obtained simply and inexpensively, and the piping can be simplified.

Further, the present invention is characterized in that the drainage swirl vanes are provided so as not to be located on the center line of the upper pipe bottom of the joint. It can prevent accumulation.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a schematic front view showing a general example of the entire drainage pipe.

FIG. 5 is a front view showing a conventional drain horizontal main pipe offset structure.

FIG. 6 is an explanatory diagram of a drainage flow condition in a conventional offset upper joint.

FIG. 7 is an explanatory diagram of a drainage flow condition in a conventional offset upper joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Offset upper joint 1A Inside curved wall 1B Upper pipe bottom 2 Upper drain horizontal main pipe 3 Lower riser pipe 8 Drain swirl vane

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-9961 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E03C 1/12 E03C 1/122 F16L 41 / 02

Claims (2)

(57) [Claims] 1. An offset upper joint of a horizontal drain main pipe connected via a curved pipe or the like to an upper / lower end of a drainage pipe of a multi-story building or to a middle or a lower end of a lowermost collecting pipe via a curved pipe or the like. Consists of a bent tube bent at 45 or 90 degrees, on the inner surface of the inner curved wall of the joint, the exhaust flowing into the offset upper joint.
Drain swirl vanes so that water drifts toward the joint side wall.
A drainage horizontal main pipe offset upper joint characterized by being disposed obliquely with respect to a pipe axis . 2. An offset upper joint according to claim 1, wherein the drainage swirl vanes are provided so as not to be located on the center line of the upper pipe bottom of the joint.